Biomedical subjects
Publications and source records attributed to J Kisslo.
Some Medicare carriers have independently decided to treat all billings for echocardiographic services as radiologic, whereas others have decided to treat billings from multispecialty practices that include a radiologist as radiologic services. The result is that the radiology fee schedules are being applied, even though the services were not supplied by radiologists.
The Omnibus Budget Reconciliation Act of 1987 has significantly changed the rules governing the way in which charges must be made to Medicare concerning certain tests, including ultrasound, by a physician who provides these tests by means of an outside supplier. If the physician does not identify the supplier or indicate the amount charged by the supplier for the test, no payment is allowed, and the physician may not bill the beneficiary any amount for the test.
When a sonographer renders diagnostic interpretations from echocardiographic data, the possibility exists that state statutes concerning the unauthorized practice of medicine may be violated. Problems likely exist in this regard when the sonographer renders such interpretations without proper physician interaction or when the physician delegates such responsibilities to the sonographer. In such situations the physician may be guilty of aiding and abetting the unauthorized practice of medicine. Such practices may also violate various reimbursement rules and policies. Given such a situation, even the rendering of preliminary results by sonographers without appropriate supervision by the physician may be in violation of various state statutes and rules governing reimbursement procedures.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Medicare reimbursement for echocardiographic procedures is clouded by the fact that Medicare defines ultrasound services to be "radiologic." As such, a 40% limitation has been imposed in some states. In addition, as a result of the Omnibus Budget Reconciliation Act of 1987, a new radiology fee structure was negotiated with Medicare, without the input of internists and cardiologists, that may significantly affect reimbursement patterns for echocardiographic services. Those who perform and interpret cardiac ultrasound studies are again urged to use the medicine codes (90,000 series) rather than radiology codes (70,000 series).
Detection of the proximal left and right coronary arteries is possible by transesophageal echocardiography with rather high frequencies. The proximal left coronary artery can be detected in 86% of patients and the proximal right in 82%. Precise identification of obstructive disease is possible but is confounded by heart movement and as yet inadequate criteria for its presence to make this routinely clinically possible. It is also possible to detect flow within these vessels with conventional pulsed or Doppler color flow methods. Given recent improvements in system performance, it is likely that adequate descriptors of proximal coronary anatomy and obstruction will be likely with these approaches.
To use Albunex as a blood-flow tracer, the stability and consistency of microspheres under mixing conditions must be known. This study examined the effects of mixing conditions and machine settings on the size and echogenicity of Albunex solutions in vitro. Acoustic power, log compression, time-gain compensation, and transducer frequency were varied as Albunex solutions were imaged after mixing with magnetic stirring and pressurized. Higher acoustic power and lower transducer frequency decreased mean pixel intensity of Albunex solution images over time. Intensity, size, and number of Albunex microspheres were not significantly different between stirring speeds. The echogenicity of the Albunex solutions decreased with pressurization, and the critical pressure necessary to reduce the intensity to half its initial value increased with the logarithm of concentration (r = 0.91; p < 0.001). The microsphere size decreased with pressurization and remained smaller after pressure release (3.66 +/- 2.13 versus 1.47 +/- 0.95 microns; p < 0.01). These data indicate that acoustic power and transducer frequency may affect the physical properties of Albunex microspheres, decreasing mean videointensity. Pressure sensitivity of Albunex caused the decrease of videointensity and microsphere size.
Patient records in 36 consecutively identified patients with typical echocardiographic findings of atrial septal aneurysm were reviewed. Ten of the 36 (28%) had cerebrovascular events. Of these 10, 5 had completed strokes of definite embolic origin on the basis of clinical, angiographic, and computed tomographic findings; 2 had transient ischemic attacks of probable embolic origin. One of the 36 patients had a definite peripheral vascular embolus. Thus, 6 of 36 consecutively identified patients with atrial septal aneurysm (17%) had definite embolic events and 8 of 36 (22%) had definite or possible embolic events. The cause of the association between atrial septal aneurysm and emboli is unknown. While aneurysm-associated thrombus has been suggested, the high proportion (90%) of patients with interatrial shunting demonstrated by contrast echocardiography in this study suggests paradoxical embolization as a potential cause. Whatever its mechanism, the high prevalence of embolic events in this series strongly supports the premise that atrial septal aneurysm is a cardiac abnormality with embolic potential.